C2D Cloud/Star/Core Catalog Definitions

C2D Overview

IRSA provides access to data from the final delivery (DR4, Fall 2006 and Fall 2007) of the Spitzer Space Telescope "From Molecular Cores to Planet-Forming Disks" (c2d) Legacy Project. The data are also available as Enhanced Products from the Spitzer Science Center (SSC).

c2d has delivered 867 catalogs. IRSA has merged these delivered catalogs into four groups - Clouds, Off-Cloud, Cores, Stars - and serves them through the general catalog search engine Gator. Many of the delivered catalogs, images and spectra are accessible through IRSA's general search service, Atlas. A summary of the catalogs types and how to access them is as follows:

Catalog Name	Content	Gator Access (merged)	Atlas Access (as delivered)
FULL	Complete source lists (Section 3.2 of c2d data delivery document [ps \| pdf])	Y	Y
HREL	Derived from the full catalogs are high reliability catalogs (Section 3.2.1 [ps \| pdf])	Y	Y
YSOc	Derived from the full catalogs are young stellar object candidates (Section 3.2.2 [ps \| pdf])	Y	Y
MM	Millimeter wavelength source lists (Section 3.2.3 [ps \| pdf])	Y	Y
Transients	Catalogs of transients in two epochs (Section 3.2.4 [ps \| pdf])	Y	N
resampled-SWIRE	Resampled sources in the ELAIS N1 field measured by the SWIRE Legacy Project, that have been used to study c2d background contamination (Section 3.8 [ps \| pdf])	N (see footnote 1 for download information) ¹	N (see footnote 1 for download information) ¹

¹ resampled-SWIRE catalogs can be downloaded in their entirety per cloud (CHA_II, LUP, OPH, PER, and SER).

The data are also available for direct download as follows: images and associated catalogs are organized according to object type - CORES or STARS - or the names of 5 major CLOUDS - ChamaeleonII (CHA_II), Lupus (LUP), Ophiuchus (OPH), Perseus (PER) and Serpens (SER); IRS spectra and MIPS SED's are organized by object name.

C2D Cloud/Star/Core Catalog Definitions

Gator serves the following C2D Cloud/Star/Core merged catalogs created by IRSA, all of which have the same columns. The "region" column in the merged catalog indicates which dataset the data originated from; region names are taken from the original, delivered catalog file name, stripping off the "catalog-" prefix and "-????.tbl" suffix (where ???? is FULL, HREL or YSOc).

Cloud FULL Catalog - contains all FULL catalogs for CHA_II, LUP, OPH, PER and SER
Cloud HREL Catalog - contains all HREL catalogs for CHA_II, LUP, OPH, PER and SER
Cloud YSOc Catalog - contains all candidate YSOc catalogs for CHA_II, LUP, OPH, PER and SER
Off-Cloud FULL Catalog - contains all FULL catalogs for CHA_II OC, LUP OC, OPH OC, PER OC and SER OC
Off-Cloud HREL Catalog - contains all HREL catalogs for CHA_II, LUP, OPH, PER and SER
Off-Cloud YSOc Catalog - contains all candidate YSOc catalogs for CHA_II, LUP, OPH, PER and SER
CORES FULL Catalog - contains all FULL catalogs for CORES
CORES HREL Catalog - contains all HREL catalogs for CORES
CORES YSOc Catalog - contains all candidate YSOc catalogs for CORES
STARS FULL Catalog - contains all FULL catalogs for STARS
STARS HREL Catalog - contains all HREL catalogs for STARS
STARS YSOc Catalog - contains all candidate YSOc catalogs for STARS

Please refer to the data delivery documentation for further information. The column descriptions can be found below.

name	intype	units	description
region	char		Region or cloud from which this catalog was drawn. Please see section above for the derivation of region column values. All possible region string values can be found here for CLOUDS, OFF CLOUDS, STARS and CORES.
c2d_ID	char		Source name. The standard format is SSTc2d Jhhmmss.s+ddmmss. Note: Sources with -1 deg < dec < -1 arcmin have c2d_IDs of the form SSTc2d Jhhmmss.s+000-(m)mss. The minus sign is placed before the first nonzero minutes digit instead of in front of the degrees digits. Similarly, sources with -1 arcmin < dec < 0 place the minus sign before the first nonzero seconds digit.
ra	real	deg	Right Ascension [J2000]
D_ra	real	deg	Uncertainty in Right Ascension
dec	real	deg	Declination [J2000]
D_dec	real	deg	Uncertainty in Declination
Q_pos	char		Flag which indicates the quality of the position agreement between bands. Grades A, B, C, D, or Q are assigned as described in Section 2.4.5 of the delivery document [pdf \| ps].
Q_merge	char		Flag which indicates the overall quality of the source, combining position and flux information in the form of grades A, B, C, D, or Q as described in Section 2.4.5 of the delivery document [pdf \| ps].
id2mass	char		Source identification in 2MASS Point Source Catalog (PSC)
Prob_Galc	real		Non-normalized probability source is a galaxy as described in Section 2.5.4 of the delivery document [pdf \| ps]
alpha	real		Infrared spectral index: power-law index from a fit to all detections between 2-24 microns.
D_alpha	real		Uncertainty in spectral index
alpha_chi2	real		Reduced chi-squared from computing spectral index
alpha_nfit	int		Number of bands used to fit spectral index
object_type	char		Source classification, as described in Section 2.5 of the delivery document [pdf \| ps]
Av	real	mag	Visual extinction, as described in Section 2.5.2 of the delivery document [pdf \| ps]
D_Av	real	mag	Uncertainty in visual extinction
mag_IR1	real	mag	Unextincted IRAC1 (IRAC 3.6 um) magnitude (Section 2.5.2 [pdf \| ps])
D_mag_IR1	real	mag	Uncertainty in unextincted IRAC1 (IRAC 3.6 um) magnitude
Av_chi2	real		Reduced chi-squared from computing visual extinction (Section 2.5.2 [pdf \| ps])
Av_nfit	int		Number of bands used to fit visual extinction
J_flux_c	real	mJy	2MASS J flux
J_D_flux_c	real	mJy	Uncertainty in 2MASS J flux
J_date_c	char	dateTtime	Date of 2MASS J observation
J_Q_det_c	char		Quality of 2MASS J detection
H_flux_c	real	mJy	2MASS H flux
H_D_flux_c	real	mJy	Uncertainty in 2MASS H flux
H_date_c	char	dateTtime	Date of 2MASS H observation
H_Q_det_c	char		Quality of 2MASS H detection
Ks_flux_c	real	mJy	2MASS Ks flux
Ks_D_flux_c	real	mJy	Uncertainty in 2MASS Ks flux
Ks_date_c	char	dateTtime	Date of 2MASS Ks observation
Ks_Q_det_c	char		Quality of 2MASS Ks detection
IR1_flux_1	real	mJy	IRAC1 (IRAC 3.6 um) flux, Epoch 1
IR1_D_flux_1	real	mJy	Uncertainty in IRAC1 (IRAC 3.6 um) flux, Epoch 1
IR1_date_1	char	dateTtime	Date of IRAC1 (IRAC 3.6 um) observation, Epoch 1
IR1_Q_det_1	char		Quality of IRAC1 (IRAC 3.6 um) detection, Epoch 1
IR1_flux_2	real	mJy	IRAC1 (IRAC 3.6 um) flux, Epoch 2
IR1_D_flux_2	real	mJy	Uncertainty in IRAC1 (IRAC 3.6 um) flux, Epoch 2
IR1_date_2	char	dateTtime	Date of IRAC1 (IRAC 3.6 um) observation, Epoch 2
IR1_Q_det_2	char		Quality of IRAC1 (IRAC 3.6 um) detection, Epoch 2
IR1_flux_c	real	mJy	IRAC1 (IRAC 3.6 um) flux, combined epochs
IR1_D_flux_c	real	mJy	Uncertainty in IRAC1 (IRAC 3.6 um) flux, combined epochs
IR1_date_c	char	dateTtime	Date of IRAC1 (IRAC 3.6 um) observation, combined epochs
IR1_Q_det_c	char		Quality of IRAC1 (IRAC 3.6 um) detection, combined epochs
IR1_Q_flux_m	char		Quality of IRAC1 (IRAC 3.6 um) flux match
IR1_imtype	int		Image type from IRAC1 (IRAC 3.6 um) source extraction
IR1_src_area	real	pixel_sq	Area of IRAC1 (IRAC 3.6 um) source
IR1_amajor	real	pixels	Length of IRAC1 (IRAC 3.6 um) source major axis
IR1_aminor	real	pixels	Length of IRAC1 (IRAC 3.6 um) source minor axis
IR1_tilt	real	deg	Tilt angle for IRAC1 (IRAC 3.6 um)
IR2_flux_1	real	mJy	IRAC2 (IRAC 4.5 um) flux, Epoch 1
IR2_D_flux_1	real	mJy	Uncertainty in IRAC2 (IRAC 4.5 um) flux, Epoch 1
IR2_date_1	char	dateTtime	Date of IRAC2 (IRAC 4.5 um) observation, Epoch 1
IR2_Q_det_1	char		Quality of IRAC2 (IRAC 4.5 um) detection, Epoch 1
IR2_flux_2	real	mJy	IRAC2 (IRAC 4.5 um) flux, Epoch 2
IR2_D_flux_2	real	mJy	Uncertainty in IRAC2 (IRAC 4.5 um) flux, Epoch 2
IR2_date_2	char	dateTtime	Date of IRAC2 (IRAC 4.5 um) observation, Epoch 2
IR2_Q_det_2	char		Quality of IRAC2 (IRAC 4.5 um) detection, Epoch 2
IR2_flux_c	real	mJy	IRAC2 (IRAC 4.5 um) flux, combined epochs
IR2_D_flux_c	real	mJy	Uncertainty in IRAC2 (IRAC 4.5 um) flux, combined epochs
IR2_date_c	char	dateTtime	Date of IRAC2 (IRAC 4.5 um) observation, combined epochs
IR2_Q_det_c	char		Quality of IRAC2 (IRAC 4.5 um) detection, combined epochs
IR2_Q_flux_m	char		Quality of IRAC2 (IRAC 4.5 um) flux match
IR2_imtype	int		Image type from IRAC2 (IRAC 4.5 um) source extraction
IR2_src_area	real	pixel_sq	Area of IRAC2 (IRAC 4.5 um) source
IR2_amajor	real	pixels	Length of IRAC2 (IRAC 4.5 um) source major axis
IR2_aminor	real	pixels	Length of IRAC2 (IRAC 4.5 um) source minor axis
IR2_tilt	real	deg	Tilt angle for IRAC2 (IRAC 4.5 um)
IR3_flux_1	real	mJy	IRAC3 (IRAC 5.8 um) flux, Epoch 1
IR3_D_flux_1	real	mJy	Uncertainty in IRAC3 (IRAC 5.8 um) flux, Epoch 1
IR3_date_1	char	dateTtime	Date of IRAC3 (IRAC 5.8 um) observation, Epoch 1
IR3_Q_det_1	char		Quality of IRAC3 (IRAC 5.8 um) detection, Epoch 1
IR3_flux_2	real	mJy	IRAC3 (IRAC 5.8 um) flux, Epoch 2
IR3_D_flux_2	real	mJy	Uncertainty in IRAC3 (IRAC 5.8 um) flux, Epoch 2
IR3_date_2	char	dateTtime	Date of IRAC3 (IRAC 5.8 um) observation, Epoch 2
IR3_Q_det_2	char		Quality of IRAC3 (IRAC 5.8 um) detection, Epoch 2
IR3_flux_c	real	mJy	IRAC3 (IRAC 5.8 um) flux, combined epochs
IR3_D_flux_c	real	mJy	Uncertainty in IRAC3 (IRAC 5.8 um) flux, combined epochs
IR3_date_c	char	dateTtime	Date of IRAC3 (IRAC 5.8 um) observation, combined epochs
IR3_Q_det_c	char		Quality of IRAC3 (IRAC 5.8 um) detection, combined epochs
IR3_Q_flux_m	char		Quality of IRAC3 (IRAC 5.8 um) flux match
IR3_imtype	int		Image type from IRAC3 (IRAC 5.8 um) source extraction
IR3_src_area	real	pixel_sq	Area of IRAC3 (IRAC 5.8 um) source
IR3_amajor	real	pixels	Length of IRAC3 (IRAC 5.8 um) source major axis
IR3_aminor	real	pixels	Length of IRAC3 (IRAC 5.8 um) source minor axis
IR3_tilt	real	deg	Tilt angle for IRAC3 (IRAC 5.8 um)
IR4_flux_1	real	mJy	IRAC4 (IRAC 8.0 um) flux, Epoch 1
IR4_D_flux_1	real	mJy	Uncertainty in IRAC4 (IRAC 8.0 um) flux, Epoch 1
IR4_date_1	char	dateTtime	Date of IRAC4 (IRAC 8.0 um) observation, Epoch 1
IR4_Q_det_1	char		Quality of IRAC4 (IRAC 8.0 um) detection, Epoch 1
IR4_flux_2	real	mJy	IRAC4 (IRAC 8.0 um) flux, Epoch 2
IR4_D_flux_2	real	mJy	Uncertainty in IRAC4 (IRAC 8.0 um) flux, Epoch 2
IR4_date_2	char	dateTtime	Date of IRAC4 (IRAC 8.0 um) observation, Epoch 2
IR4_Q_det_2	char		Quality of IRAC4 (IRAC 8.0 um) detection, Epoch 2
IR4_flux_c	real	mJy	IRAC4 (IRAC 8.0 um) flux, combined epochs
IR4_D_flux_c	real	mJy	Uncertainty in IRAC4 (IRAC 8.0 um) flux, combined epochs
IR4_date_c	char	dateTtime	Date of IRAC4 (IRAC 8.0 um) observation, combined epochs
IR4_Q_det_c	char		Quality of IRAC4 (IRAC 8.0 um) detection, combined epochs
IR4_Q_flux_m	char		Quality of IRAC4 (IRAC 8.0 um) flux match
IR4_imtype	int		Image type from IRAC4 (IRAC 8.0 um) source extraction
IR4_src_area	real	pixel_sq	Area of IRAC4 (IRAC 8.0 um) source
IR4_amajor	real	pixels	Length of IRAC4 (IRAC 8.0 um) source major axis
IR4_aminor	real	pixels	Length of IRAC4 (IRAC 8.0 um) source minor axis
IR4_tilt	real	deg	Tilt angle for IRAC4 (IRAC 8.0 um)
MP1_flux_1	real	mJy	MIPS1 (MIPS 24 um) flux, Epoch 1
MP1_D_flux_1	real	mJy	Uncertainty in MIPS1 (MIPS 24 um) flux, Epoch 1
MP1_date_1	char	dateTtime	Date of MIPS1 (MIPS 24 um) observation, Epoch 1
MP1_Q_det_1	char		Quality of MIPS1 (MIPS 24 um) detection, Epoch 1
MP1_flux_2	real	mJy	MIPS1 (MIPS 24 um) flux, Epoch 2
MP1_D_flux_2	real	mJy	Uncertainty in MIPS1 (MIPS 24 um) flux, Epoch 2
MP1_date_2	char	dateTtime	Date of MIPS1 (MIPS 24 um) observation, Epoch 2
MP1_Q_det_2	char		Quality of MIPS1 (MIPS 24 um) detection, Epoch 2
MP1_flux_c	real	mJy	MIPS1 (MIPS 24 um) flux, combined epochs
MP1_D_flux_c	real	mJy	Uncertainty in MIPS1 (MIPS 24 um) flux, combined epochs
MP1_date_c	char	dateTtime	Date of MIPS1 (MIPS 24 um) observation, combined epochs
MP1_Q_det_c	char		Quality of MIPS1 (MIPS 24 um) detection, combined epochs
MP1_Q_flux_m	char		Quality of MIPS1 (MIPS 24 um) flux match
MP1_imtype	int		Image type from MIPS1 (MIPS 24 um) source extraction
MP1_src_area	real	pixel_sq	Area of MIPS1 (MIPS 24 um) source
MP1_amajor	real	pixels	Length of MIPS1 (MIPS 24 um) source major axis
MP1_aminor	real	pixels	Length of MIPS1 (MIPS 24 um) source minor axis
MP1_tilt	real	deg	Tilt angle for MIPS1 (MIPS 24 um)
MP2_flux_1	real	mJy	MIPS2 (MIPS 70 um) flux, Epoch 1
MP2_D_flux_1	real	mJy	Uncertainty in MIPS2 (MIPS 70 um) flux, Epoch 1
MP2_date_1	char	dateTtime	Date of MIPS2 (MIPS 70 um) observation, Epoch 1
MP2_Q_det_1	char		Quality of MIPS2 (MIPS 70 um) detection, Epoch 1
MP2_flux_2	real	mJy	MIPS2 (MIPS 70 um) flux, Epoch 2
MP2_D_flux_2	real	mJy	Uncertainty in MIPS2 (MIPS 70 um) flux, Epoch 2
MP2_date_2	char	dateTtime	Date of MIPS2 (MIPS 70 um) observation, Epoch 2
MP2_Q_det_2	char		Quality of MIPS2 (MIPS 70 um) detection, Epoch 2
MP2_flux_c	real	mJy	MIPS2 (MIPS 70 um) flux, combined epochs
MP2_D_flux_c	real	mJy	Uncertainty in MIPS2 (MIPS 70 um) flux, combined epochs
MP2_date_c	char	dateTtime	Date of MIPS2 (MIPS 70 um) observation, combined epochs
MP2_Q_det_c	char		Quality of MIPS2 (MIPS 70 um) detection, combined epochs
MP2_Q_flux_m	char		Quality of MIPS2 (MIPS 70 um) flux match
MP2_imtype	int		Image type from MIPS2 (MIPS 70 um) source extraction
MP2_src_area	real	pixel_sq	Area of MIPS2 (MIPS 70 um) source
MP2_amajor	real	pixels	Length of MIPS2 (MIPS 70 um) source major axis
MP2_aminor	real	pixels	Length of MIPS2 (MIPS 70 um) source minor axis
MP2_tilt	real	deg	Tilt angle for MIPS2 (MIPS 70 um)